(~d)
1.
An ~ is an organization which is officially connected with another, larger organization or is a member of it. (FORMAL)
The World Chess Federation has ~s in around 120 countries.
N-COUNT: oft with poss
2.
If an organization ~s to or with another larger organization, it forms a close connection with the larger organization or becomes a member of it. (FORMAL)
All youth groups will have to ~ to the National Youth Agency...
VERB: V to/with n